大学英语大学英语大学英语四级(CET4)大学英语四级模拟题20

试卷预览

• 11According to the passage, the railroad industry preferred steel to iron because steel was ____.

  A.cheaper and more plentiful

  B.lighter and easier to mold

  C.cleaner and easier to mine

  D.stronger and more durable

  开始考试练习点击查看答案
• 12According to the passage, how did Bessemer method make the mass production of steel possible、

  A.It directed air at melted iron in a furnace, removing all impurities.

  B.It slowly heated iron ore then stirred it and heated it again.

  C.It changed iron ore into iron which was a substitute for steel.

  D.It could quickly find deposits of iron ore under the ground.

  开始考试练习点击查看答案
• 13According to the passage, where were large deposits of iron uncovered、

  A.In Pittsburgh.

  B.In the Mesabi Range.

  C.Near Lake Michigan.

  D.Near Lake Eri

  开始考试练习点击查看答案
• 14The words “Barges and steamers” could best be replaced by which of the following、

  A.Trains.

  B.Planes.

  C.Boats.

  D.Trucks.

  开始考试练习点击查看答案
• 15It can be inferred from the passage that the mass production of steel caused ____.

  A.a decline in the railroad industry

  B.a revolution in the industrial world

  C.an increase in the price of steel

  D.a feeling of discontent among steel workers

  开始考试练习点击查看答案
• 16With what is the passage mainly concerned、

  A.The drawbacks of descriptive and inferential statistics.

  B.Applications of inferential statistics.

  C.The development and use of statistics.

  D.How to use descriptive statistics.

  开始考试练习点击查看答案
• 17Why does the author mention the “mother” and “father” in the first paragraph、

  A.To point out that parents can teach their children statistics.

  B.To introduce inferential statistics.

  C.To explain that there are different kinds of variables.

  D.To present the background of statistics in a humorous and understandable way.

  开始考试练习点击查看答案
• 18Which of the following is NOT given as an example of qualitative variable、

  A.Gender.

  B.Height.

  C.College major.

  D.Type of personality.

  开始考试练习点击查看答案
• 19Which of the following statements about descriptive statistics is best supported by the passage、

  A.It simplifies unwieldy masses of data.

  B.It leads to increased variability.

  C.It solves all numerical problems.

  D.It changes qualitative variables to quantitative variables.

  开始考试练习点击查看答案
• 20According to the passage which is the purpose of examining a sample of a population、

  A.To compare different groups.

  B.To predict characteristics of the entire population.

  C.To consider all the quantitative variables.

  D.To tabulate collections of data.

  开始考试练习点击查看答案